Improvement in cotton-gins



J. DU BOIS.

Cotton Gin.

Patented April 27, 1858.

PATENT' OFFICE.

JOHN DU BOIS, OF GREENSBOROUGI-I, ALABAMA.

IMPROVEMENT IN COTTQN-GINS.

Speci'ication forming part of Lctters Patent No. 20,051, dated April 27,E58.

To all whom it may concern Be it known that I, JOHN DU Bois, of thetownof Greensborough, county of Greene, and

State of Alabama, have invented a new and.

useful Improvement in Cotton Gins; and I hereby do deelare that thefollowing is a full, clear, and exact description, reference being hadto the accoinpanying drawings, forming a part of this speoiiication, inwhich- -Figure 1 is a Vertical section of the saw and rib with theflange or projection b. Fig. 2 is a perspective view of the rib andflange I) on the face of the rib near to one edge. Fig. 3 is aperspective view of the rib with the flange b on the middle of the faceof the rib.

The same letters of reference indieate like parts on all the figures.

The nature of my invention consists in the construction, arrangement,and Operation of a semi-hexagonal flange or projection on the face ofthe rib at the point Where the seed,whilebeing ginned,are discharged,toprevent their falling out before the lint is taken off, and to dischargethem as soon as this is accomplished, and thereby increase the quantityof cotton ginned in a given time.

To enable others skilled in' the art to make and use my invention, Iwill proceed to describe my invention, its construction, and operation.

The rib may be constructedin the ordinary manner, but more depressed anddeeper in the saws than usual at the point where the seed are dischargedand where the fiange is located. The center of the flange b is placedabout the point where the seed are discharged, as seen in Fig-.Landabout the lower end ofthe hopperboard c. The flange is a little morethan onceighth of an inch thick and about two and a half inches inlength, more or less, and about one-half of an inch deep, more or less.The

rib may be made thin at the place where the flange is placed, and ofsufiicient Width to be strong enough for practical purposes, and therebyserve for rib and flange at the same time. The flange may be placedabout the middlc of the face of the rib when the seed are small,otherwise near one edge, as in Fig. 2. The iianges are cast on the ribs,or otherwise attached to them. These ribs can be applied to gins inwhichthe cotton is fed to the saws above then1,-and in the same roll-boxwhere the lint is stri pped from the seed by the teeth of the saws.

The Operation of my gin is as follows: The Cotton is fed into theroll-box in the usual way above and upon the saws, the fianges servingto keep the seed in contact with the teeth of the saws until the lint istaken off, when the seed will glide down between the flanges and saws,the flanges at the same time preventing the roll in its upward motionfrom carrying the seed back into the box. method the seed are dischargedmore freely than usual.

It is prop'er to remark that I use but one ro1l-box,like the lVhitinggin, into which box; or hopper the cotton is fed.

Having fully described the construction and Operation of my improvement,what I claim, and wish to secure by Letters Patent, is-- The use of thefiange Z) on the face of the rib, construoted, arranged, and operatingin the manner described-that is to say, the fiange situated opposite thelower edge of the hopper-board c, with the lower end extending belowthat -point to separate the ginned seed from the cotton, andfacilitatetheir passage from the roll-box.

J OHBT DU BOIS.

\Vit1iesses:`

WARREN E. Knxxnny, RUnUs U. DU Bois.

By this

